Revert 89864 - Don't rely on user gestures for deciding when to dismiss infobars.

chrome/browser/tab_contents/infobar_delegate.h

Index: chrome/browser/tab_contents/infobar_delegate.h
===================================================================
--- chrome/browser/tab_contents/infobar_delegate.h	(revision 91739)
+++ chrome/browser/tab_contents/infobar_delegate.h	(working copy)
@@ -57,8 +57,8 @@
   virtual bool EqualsDelegate(InfoBarDelegate* delegate) const;
 
   // Returns true if the InfoBar should be closed automatically after the page
-  // is navigated. The default behavior is to return true if the
-  // navigation is to a new page (not including reloads).
+  // is navigated. The default behavior is to return true if the user initiated
+  // navigation somewhere else or reloaded.
   virtual bool ShouldExpire(
       const content::LoadCommittedDetails& details) const;